<?php

namespace app\admin\controller;

use app\admin\model\User;
use app\common\controller\Backend;
use think\Db;
use think\exception\PDOException;
use think\exception\ValidateException;

/**
 * 学校班级管理
 *
 * @icon fa fa-circle-o
 */
class Schoolclass extends Backend
{

    /**
     * Schoolclass模型对象
     * @var \app\admin\model\Schoolclass
     */
    protected $model = null;

    public function _initialize()
    {
        parent::_initialize();
        $this->model = new \app\admin\model\Schoolclass;

    }



    /**
     * 默认生成的控制器所继承的父类中有index/add/edit/del/multi五个基础方法、destroy/restore/recyclebin三个回收站方法
     * 因此在当前控制器中可不用编写增删改查的代码,除非需要自己控制这部分逻辑
     * 需要将application/admin/library/traits/Backend.php中对应的方法复制到当前控制器,然后进行修改
     */
    public function index()
    {

        //当前是否为关联查询
        $this->relationSearch = true;
        //设置过滤方法
        $this->request->filter(['strip_tags', 'trim']);
        if ($this->request->isAjax()) {
            //如果发送的来源是Selectpage，则转发到Selectpage
            if ($this->request->request('keyField')) {
                return $this->selectpage();
            }
            list($where, $sort, $order, $offset, $limit) = $this->buildparams();

            $list = $this->model
                ->with(['school',"grade",'grade_class',"teachers"])
                ->where($where)
                ->order($sort, $order)
                ->paginate($limit);

            foreach ($list as &$row) {
//                $row->visible(['id','name','create_time']);
//                $row->visible(['grade']);
                $row->getRelation('teachers')->visible(['nickname']);
                //查询班级的学生数量
                $row->student_num = (new User())->where("type",2)
                    ->where("school_id",$row->school_id)
                    ->where('class_id',$row->class_id)
                    ->count();


            }

            $result = array("total" => $list->total(), "rows" => $list->items());

            return json($result);
        }
        return $this->view->fetch();
    }


    public function add()
    {  if (false === $this->request->isPost()) {
        return $this->view->fetch();
    }
        $params = $this->request->post('row/a');
        if (empty($params)) {
            $this->error(__('Parameter %s can not be empty', ''));
        }
        $params = $this->preExcludeFields($params);

        if ($this->dataLimit && $this->dataLimitFieldAutoFill) {
            $params[$this->dataLimitField] = $this->auth->id;
        }
        $result = false;
        Db::startTrans();
        try {
            //是否采用模型验证
            if ($this->modelValidate) {
                $name = str_replace("\\model\\", "\\validate\\", get_class($this->model));
                $validate = is_bool($this->modelValidate) ? ($this->modelSceneValidate ? $name . '.add' : $name) : $this->modelValidate;
                $this->model->validateFailException()->validate($validate);
            }
            //不允许重复新增
            $has = $this->model->where('teacher_id',$params['teacher_id'])->where("class_id",$params['class_id'])->count();
            if ($has){
                Db::rollback();
                $this->error("该老师已经添加过该班级");
            }

            $result = $this->model->allowField(true)->save($params);
            Db::commit();

            //更新老师表的数据 找到老师的id
            $all_class = $this->model->where('teacher_id',$params['teacher_id'])->select();
            //反查数据更新
            $item = [];
            foreach ($all_class as $k=>$v){
                $item[] = $v['class_id'];
            }
            (new User())->where("id",$params['teacher_id'])->update(["class_id"=>implode(",",$item)]);

        } catch (ValidateException|PDOException|Exception $e) {
            Db::rollback();
            $this->error($e->getMessage());
        }
        if ($result === false) {
            $this->error(__('No rows were inserted'));
        }
        $this->success();
    }



    public function fix(){
        $list = $this->model->select();
        foreach ($list as $k=>$v){
            //查询对应的学校和年级班级数据是否存在 不存在的进行删除
            $sch = (new \app\admin\model\School())->where("id",$v->school_id)->count();
            $grade = (new \app\admin\model\Grade())->where("grade",$v->grade_id)->count();
            $class = (new \app\admin\model\GradeClass())->where("id",$v->class_id)->count();
            if (!$sch || !$grade || !$class){
                $this->model->where("id",$v->id)->delete();
            }
            //如果这个班级没有学生 也删除数据
            $student = (new User())->where("type",2)->where("class_id",$v->class_id)->count();
            if (!$student){
                $this->model->where("id",$v->id)->delete();
            }
        }
        $this->success();
    }
}
